Can I play game backups on Wii 4.3u?

I am a TOTAL newbie when it comes to modding. My Wii currently has 4.3u. I have installed Homebrew/Homebrew Browser, but that's about as far as I've gotten. I've looked everywhere online (Google, YouTube, etc), but all that I can find are ways to do this with previous versions (4.1 and below). Either I am not looking in the correct place or I've just looked over it. I've spend about 4 hours doing research today and nothing seems to have helped. Any and all help would greatly be appreciated. Thanks in advance!